I have tried to use the GNUSH v0204 Tool Chain for ELF format to compile the
Rockbox source code. The compilation ended with an internal error in the C
compiler. There was a problem with the support of '#pragma interrupt'
instruction. I reported the bug to KPIT support request list and here is
their answer: 'We confirm this is a bug in GNUSHv0204. We will try to fix
this in next release. Meanwhile you can use GNUSHv0203 to avoid this
problem'

I just wanted to report this problem for other people who would want to
compile with the GNUSH v0204 Tool Chain.